ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ 3,197,400	$ 2,966,451	$ 2,647,088
Reclassification for losses included in net income, net of tax	229	0	0
Current year changes, net of tax	10,339	(62,097)	(17,915)
Balance at end of period	3,426,747	3,197,400	2,966,451
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(46,507)	15,590	33,505
Balance at end of period	(35,939)	(46,507)	15,590
Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(46,507)	15,590	33,505
Reclassification for losses included in net income, net of tax	229
Current year changes, net of tax	10,339	(62,097)	(17,915)
Balance at end of period	$ (35,939)	$ (46,507)	$ 15,590